Portable derrick crane



Sept. 25, 1951 s 2,568,959

PORTABLE DERRICK CRANE Filed Sept. 26, 1947 2 Sheets-Sheet l 0) Henry F.11H B5 A tln rneys I nveutor I P 1951 H. F. ILLIES 2,568,959

I PORTABLE DERRICK CRANE Filed Sept. 26, 1947 2 Sheets-Sheet 2 w HBT'LFHF. IHies A m may:

Patented Sept. 25 1951 if.

UNITED STATES" PATENT OFFICE f 1 2,568,859 I f PORTABLE DERRICK CRANEHenry F. Illies, Fosston, Minn. Application September 26, 1947, SerialNo. 776,256

This invention relates to a derrick crane adapted to be mounted on asmall motor vehicle and while adapted generally for supporting, raisingand lowering or conveying heavy objects is especially adapted to providea support for an'-- auger such as is employed for digging post holes andby means of which the auger may be adjusta- -bly supported with respectto the vehicle, lowered gradually as it advances into the ground,

subsequently raised out of a hole dug thereby for lifting the dirt outof the hole with the auger thereby leaving a clean hole ready to receivea post or pole, and by means of which the auger may be swung through ahorizontal arc relatively to the vehicle on which the derrick crane ismounted for positioning the auger at any desired location with respectthereto.

Still another object of the invention is to provide a portable derrickcrane of the character previously described having an extensible jib orspar by means of which the supporting means attached to the auger orother load may be extended or retracted relatively to the derrick cranemast for positioning the auger or load at various distances or radiiwith respect to a given point of the vehicle to afford means whereby theauger may be employed on the opposite side of a fence,

' trench or other obstruction from the supporting vehicle of the derrickcrane.

Still another object of the invention is to provide a derrick crane aspreviously described having driving means of relatively low horsepower-for actuating the hoisting rig for raising and lowering the auger orother thereby.

Still a further object of the invention is to provide a portable derrickcrane having a novel frame structure for securely mounting it on a loadsupported motor vehicle and by meansof which the derrick thereof, andwherein:

Figure 1 is a perspective view of the portable derrick crane;

Figure 2 is an enlarged side elevational view of a portion thereof, and

Figure 3 is-an enlarged perspectiveview of the 1 Claim. (Cl. 212-55)bearing in which the upper end of the crane and mast is journaled.

Referring more particularly to the drawings, for the purpose ofillustrating a preferred application and use of the invention, a jeeptype truck is shown in Figure 1 at 5 in broken lines with the frame,designated generally 6 of the derrick crane -1 shown mounted thereon.

The frame 6 includes upright corner posts 8 which rise from the vehicle5, adjacent the four corners thereof; the two rear upright posts 8 beingsecured to the rear corners of the vehicle 5 and the two forward posts 8being secured to theends of a transverse supporting bar 9 formed ofangle iron. The posts 8 are connected at their upper ends by arectangular frame l0 formed of longitudinally extending side members andtransversely extending end members which are braced to each corner postby diagonal braces H. The frame 6 also includes longitudinally extendingside members I 2 which join at their ends with the lower ends of thecorner posts 8 located at corresponding sides of the ehicle 5. The frame6 also includes upright side posts l3 located intermediate of the endsof the frame and which are connected to the longitudinal side members I!and the side members of the frame portion I0, located thereabove andwhich are likewise braced relatively to the frame portion I I) byadditional diagotively to said platform 'I 6 by diagonal brace mem-"bersl9.

The platform It supports an upwardly opening socket 20 in which is'swivelly supported the lower end of a substantially uprightmast 2|,form- 'ing a part of the derrick crane 1 and which is journalled nearits upper endin a bearing br naled in a cap 24which, as best seen inFigure' 3,

is provided with two pairs of ears 25 which project radially from theperiphery thereof for receiving between each pair-orsaid" ears-the re.-

gearbox. nally atone end thereoftothe-brace 34.-and has stricted end 26of a brace rod 21. The ends 26 are fastened between the ears 25 byfastenings 26 and said pairs of ears are spaced from one another so thatthe tie rods 21 can extend downwardly and forwardly therefrom indiverging relationship to be secured at their forward ends to the twofront and upper corners of the frame 6, as clearly illustrated in Figure1.

As best illustrated in Figure 2, the derrick crane I has a'boom,designated generally 29' projecting substantially at right angles'from'adjacent the upper end thereof. The boom 29 includes an inner tubularsection 30 the inner end of which is formed integral with or suitablyrsecured-to the mast 2| and the opposite, outer end of whichtelescopically receives the other section-'"3lioffthe boom 29 whichprotrudes beyond theouterend of the section 36 and which'is provided,adjacent able elevation and has a pair of sleeve members 59, forming apart thereof and which are mounted for swivel movement with respect tothe clamp 58 and in each of which is clamped an elongated guide tube 60.The two guide tubes 60 support a pair of rods 6| which are reciprocablymounted therein and which are provided, at corresponding ends thereofwith out-turned portions 62 carrying clamps 63 at the terminal thereofwhich are secured to the ends of the arms 51. The guidetubes 60 extendrearwardly across one side of the brace 34 and are guided for swingingmovement relatively thereto by a rod 64 which its outer end, with adepending bifurcated-hanger 52 in which is journaled a pulley 33. Theboom e26 is braced relatively to the mast-2|wbya brace 34, the lower endof which is=fixed-to-or formed said section 30. Thebrace-fl isreinforced-relatively to'the mast 2 l by a; brace 35 and additionalbracesmay beprovided, if required. A-chain or flexible member 36 isattached to the brace -34,

. adjacent the upper end of the latter, and F has a :pin 31: attached toits -freeend for selective engagement in longitudinally spaced openings'38 of thcrboom section-3|, fora-purpose which will hereinafterbecomeapparent.

A platform .39 is supported between and. on

' themast 2l-andabrace34 for mounting al-motor 44, preferably a-smallelectric motor having a H driven shaft 4| provided -with a-tpulley 42.second platform 43. is: supported by 'themasti l,

below and toone side. of theplatform-N'for supporting a-gearbox 44containing reductionrgearing, not shown, and having-arshaft fi project-42 and -46- for driving -.the shaft 45 f-romwthe shaft 4| and,-.asseenin Figure 1,-a shaf t. 48,projects fromthe gear box flkatrightanglesto'the isdisposedparallel to the brace 34 and spaced therefrom byspacing members 65 which connect the rod-'64, adjacent its ends, to thebrace 34.

It will be-readily-apparent from the preceding descriptionthat theweight of the auger 56 on thecable 54 will tend to cause the boomsection 3| to telescope into the boom section 30 so that the pin 31'willfun'ction'to retain the 'boomsec- "tion 3| in an extendedposition,variable dependauger motor and z-also the motor 40. In order ing fromone side thereofand carrying a (pulley-c 46. An endless belt41-isetrainedover the pulleys shaft and 'isdriventherebyat areduced-speed by the reduction :gearing contained within. said Avbracket 49 fastened-longitudian upper, .outwardlyoff-set .end.formingrar :bearto extend the boom 29, the cable 54 can be slacked offto allow the auger 56 to cometo .rest on theground'and by providingadditional slack in 'the-cab1e-54'the boom section '3l may be readilyextended. The auger 56 ismanually guided in drilling a hole in-theearth:and as the auger penetrates-the earth the cable 54 is slacked off. Whena hole of the-.desireddepth hasbeen drilled, I the motor 40 is energized'for revolving the drum or 5 shaftw56 for rewinding' the cable '54thereon to thereby extract theauger 56 from the drilled 'hole and r atthe "same time extract 1 the loose dirt' with the auger leaving-a cleanhole in which-a post or p'ole maybe inserted.

When the auger-=56 is raisedand'l'owered the -guide-tubes60 andclamps--59 willswing relatively to the clamp 58 'and'mast 2|, andtherods 6| will slide within said guidetubes 60. ".By extending theboom29 for-positioning thea'uger 56 at a'greaterdistance from the mast '2!and the rearend of the vehicle 5,-it-will'bereadily apparent that theaugermay be utilized-onrone ing for one end of a shaft ordrum.'5I,--the-OPP -a 55 site endofwhich-is journaled inthebrace34. Apulley 5l is keyed to thershaftor-drum-jfl adjacent its last mentioned.endto be driven by the :shaft 48 by means ofan endless-belt52- which itrained-overthe pulley5l and overarpulley .53 keyed to the shaft- 48 sothat .the 4 shaft or drum 5!! will be driven at a reduced speed: shaft4| of. the motor 40.

A cable or other suitableflexible hoistingmemby the side of anobstruction and-while the vehicle I is disposed on the opposite sidethereof under "circumstances where said vehicle 'camiot be moved acrosstheobstruction. Likewise, the mast'll may rotate in-its journals'20, "22and 24 "for swinging the entire-derrick crane 1 -tln'ough="an arc ofapproxi'niately180 and sothat the auger 56 may be utilized atanyposition withinsaid arcand at various radii relatively to the mastthus accommodating the derrick crane l for'use at positions which mightotherwise be inaccessible to the vehicle 5. When the derrick crane "I isnot in use theguide tubes Gil-may be moved inwardly of the clampingsleeves 56.and the auger v56 may be swung toward and secured etowthebrace 34 to facilitate transportation-thereof. wIt :will be readilyapparent that-the tie-rodsflwill assist materially in supportingtheweightzof the auger '56.

The frame 6 and majority of-the.derricklparts 1 may beformed-oftubularrmetali as illustrated in Figure 3, or said parts may beof solid construction.

While the portable derrick crane has been described in connection 'Withthe handling of an auger, constituting a preferred utilization there-.of, it will be readily apparent that any other load may be substitutedfor the auger 56.

Various other modifications and changes are likewise contemplated andmay obviously be resorted to, without departing from the spirit or scopeof the invention as hereinafter defined by the appended claim.

I claim as my invention:

A portable derrick crane comprising a mast supporting frame adapted tobe secured to the sides and ends of a motor vehicle and supportedthereby, an upright mast swivelly supported on the frame beyond one endof the motor vehicle, an extensible boom projecting outwardly from theupper portion of the mast and disposed in a horizontal plane, said boomcomprising an inner section rigidly secured to the mast and an outerextensible section telescoping into said inner section through the outerend of the inner boom section, said outer extensible section beingprovided with a plurality of longitudinally spaced openings, a pulleyjournaled on said outer extensible section adjacent its outer end andoutwardly of the inner boom section, a driven winding drum supported bythe mast, a flexible member having one end secured to and wound on thedrum and extending from said drum over the pulley and terminating in adepending load is supportin a load.

HENRY F. IIiLIES.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 426,681 Pless Apr. 29, 1890916,902 Van Fossen Mar. 30, 1909 1,407,855, Green Feb. 28, 19221,481,219 Miller Jan. 15, 1924 1,507,776 Humiston Sept. 9, 19241,584,117 Mitchell May 11, 1926 1,663,833 Genung Mar. 27, 1928 1,860,774Erickson May 31, 1932 2,081,200 Hollingsworth May 25, 1937 2,400,478Beck May 21, 1946 2,417,031 Witherell Mar. 4, 1947 Kreu'tzer Aug. 17,

